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The lead-acid battery is the predominant choice for Uninterruptible Power Supply (UPS) energy storage. Over 10 million UPSs are presently installed utilizing Flooded, Valve Regulated Lead Acid (VLRA), and Modular Battery Catridge (MBC) systems. This paper discusses the advantages and disadvantages of these three lead-acid battery technologies.

Author

Stephen McCluer
Senior Manager,
APC
Stephen McCluer is a Senior Manager for external codes and standards at APC by Schneider Electrical Critical Power and Cooling Services Division. He has 25 years of experience in the power protection industry, and is a member of the IEEE Stationary Battery Committee where he chairs three working groups. He also is on three NFPA standards technical committees, and is a contributing member of ICC, IAEI, ASHRAE, BICSI and the Green Grid. He is frequent speaker at industry conferences, and has authored technical paper and articles on power quality and batteries.